android 使用JavaMail发送邮件

Javamail-Android配置步骤：

1. 下载Android版本JavaMail包，additional.jar、mail.jar和activation.jar，下载地址JavaMail-Android

2. 在项目与src同一目录级别下，新建文件夹lib，将下载的3个jar包放入该文件夹

3. 右键->Properties->Java Build Path->Libraries，选择Add External JARs，找到项目下lib目录的3个jar包

我的代码有三个类： 
第一个类：MailSenderInfo.java

package com.util.mail;
/**
* 发送邮件需要使用的基本信息
*/
import java.util.Properties;
public class MailSenderInfo {
    // 发送邮件的服务器的IP和端口
    private String mailServerHost;
    private String mailServerPort = "25" ;
    // 邮件发送者的地址
    private String fromAddress;
    // 邮件接收者的地址
    private String toAddress;
    // 登陆邮件发送服务器的用户名和密码
    private String userName;
    private String password;
    // 是否需要身份验证
    private boolean validate = false ;
    // 邮件主题
    private String subject;
    // 邮件的文本内容
    private String content;
    // 邮件附件的文件名
    private String[] attachFileNames;
    /**
      * 获得邮件会话属性
      */
    public Properties getProperties(){
      Properties p = new Properties();
      p.put( "mail.smtp.host" , this .mailServerHost);
      p.put( "mail.smtp.port" , this .mailServerPort);
      p.put( "mail.smtp.auth" , validate ? "true" : "false" );
      return p;
    }
    public String getMailServerHost() {
      return mailServerHost;
    }
    public void setMailServerHost(String mailServerHost) {
      this .mailServerHost = mailServerHost;
    }
    public String getMailServerPort() {
      return mailServerPort;
    }
    public void setMailServerPort(String mailServerPort) {
      this .mailServerPort = mailServerPort;
    }
    public boolean isValidate() {
      return validate;
    }
    public void setValidate( boolean validate) {
      this .validate = validate;
    }
    public String[] getAttachFileNames() {
      return attachFileNames;
    }
    public void setAttachFileNames(String[] fileNames) {
      this .attachFileNames = fileNames;
    }
    public String getFromAddress() {
      return fromAddress;
    }
    public void setFromAddress(String fromAddress) {
      this .fromAddress = fromAddress;
    }
    public String getPassword() {
      return password;
    }
    public void setPassword(String password) {
      this .password = password;
    }
    public String getToAddress() {
      return toAddress;
    }
    public void setToAddress(String toAddress) {
      this .toAddress = toAddress;
    }
    public String getUserName() {
      return userName;
    }
    public void setUserName(String userName) {
      this .userName = userName;
    }
    public String getSubject() {
      return subject;
    }
    public void setSubject(String subject) {
      this .subject = subject;
    }
    public String getContent() {
      return content;
    }
    public void setContent(String textContent) {
      this .content = textContent;
    }
}

第二个类：MultiMailsender.java

package com.util.mail;

import java.util.Date;
import java.util.Properties;

import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

/**
 * 发送邮件给多个接收者、抄送邮件
 */
public class MultiMailsender {


    /**
      * 以文本格式发送邮件
      * @param mailInfo 待发送的邮件的信息
      */
        public boolean sendTextMail(MultiMailSenderInfo mailInfo) {
          // 判断是否需要身份认证
          MyAuthenticator authenticator = null ;
          Properties pro = mailInfo.getProperties();
          if (mailInfo.isValidate()) {
          // 如果需要身份认证，则创建一个密码验证器
            authenticator = new MyAuthenticator(mailInfo.getUserName(), mailInfo.getPassword());
          }
          // 根据邮件会话属性和密码验证器构造一个发送邮件的session
          Session sendMailSession = Session.getDefaultInstance(pro,authenticator);
          try {
          // 根据session创建一个邮件消息
          Message mailMessage = new MimeMessage(sendMailSession);
          // 创建邮件发送者地址
          Address from = new InternetAddress(mailInfo.getFromAddress());
          // 设置邮件消息的发送者
          mailMessage.setFrom(from);
          // 创建邮件的接收者地址，并设置到邮件消息中
          Address[] tos = null ;
          String[] receivers = mailInfo.getReceivers();
          if (receivers != null ){
              // 为每个邮件接收者创建一个地址
              tos = new InternetAddress[receivers.length + 1 ];
              tos[ 0 ] = new InternetAddress(mailInfo.getToAddress());
              for ( int i= 0 ; i<receivers.length; i++){
                  tos[i+ 1 ] = new InternetAddress(receivers[i]);
              }
          } else {
              tos = new InternetAddress[ 1 ];
              tos[ 0 ] = new InternetAddress(mailInfo.getToAddress());
          }

          // Message.RecipientType.TO属性表示接收者的类型为TO
          mailMessage.setRecipients(Message.RecipientType.TO,tos);
          // 设置邮件消息的主题
          mailMessage.setSubject(mailInfo.getSubject());
          // 设置邮件消息发送的时间
          mailMessage.setSentDate( new Date());
          // 设置邮件消息的主要内容
          String mailContent = mailInfo.getContent();
          mailMessage.setText(mailContent);
          // 发送邮件
          Transport.send(mailMessage);
          return true ;
          } catch (MessagingException ex) {
              ex.printStackTrace();
          }
          return false ;
        }
    /**
     * 发送邮件给多个接收者,以Html内容
     * @param mailInfo    带发送邮件的信息
     * @return
     */
    public static boolean sendMailtoMultiReceiver(MultiMailSenderInfo mailInfo){
        MyAuthenticator authenticator = null ;
        if (mailInfo.isValidate()) {
            authenticator = new MyAuthenticator(mailInfo.getUserName(),
                    mailInfo.getPassword());
        }
        Session sendMailSession = Session.getInstance(mailInfo
                .getProperties(), authenticator);
        try {
            Message mailMessage = new MimeMessage(sendMailSession);
            // 创建邮件发送者地址
            Address from = new InternetAddress(mailInfo.getFromAddress());
            mailMessage.setFrom(from);
            // 创建邮件的接收者地址，并设置到邮件消息中
            Address[] tos = null ;
            String[] receivers = mailInfo.getReceivers();
            if (receivers != null ){
                // 为每个邮件接收者创建一个地址
                tos = new InternetAddress[receivers.length + 1 ];
                tos[ 0 ] = new InternetAddress(mailInfo.getToAddress());
                for ( int i= 0 ; i<receivers.length; i++){
                    tos[i+ 1 ] = new InternetAddress(receivers[i]);
                }
            } else {
                tos = new InternetAddress[ 1 ];
                tos[ 0 ] = new InternetAddress(mailInfo.getToAddress());
            }
            // 将所有接收者地址都添加到邮件接收者属性中
            mailMessage.setRecipients(Message.RecipientType.TO, tos);

            mailMessage.setSubject(mailInfo.getSubject());
            mailMessage.setSentDate( new Date());
            // 设置邮件内容
            Multipart mainPart = new MimeMultipart();
            BodyPart html = new MimeBodyPart();
            html.setContent(mailInfo.getContent(), "text/html; charset=GBK" );
            mainPart.addBodyPart(html);
            mailMessage.setContent(mainPart);
            // 发送邮件
            Transport.send(mailMessage);
            return true ;
        } catch (MessagingException ex) {
            ex.printStackTrace();
        }
        return false ;
    }

    /**
     * 发送带抄送的邮件
     * @param mailInfo    待发送邮件的消息
     * @return
     */
    public static boolean sendMailtoMultiCC(MultiMailSenderInfo mailInfo){
        MyAuthenticator authenticator = null ;
        if (mailInfo.isValidate()) {
            authenticator = new MyAuthenticator(mailInfo.getUserName(),
                    mailInfo.getPassword());
        }
        Session sendMailSession = Session.getInstance(mailInfo
                .getProperties(), authenticator);
        try {
            Message mailMessage = new MimeMessage(sendMailSession);
            // 创建邮件发送者地址
            Address from = new InternetAddress(mailInfo.getFromAddress());
            mailMessage.setFrom(from);
            // 创建邮件的接收者地址，并设置到邮件消息中
            Address to = new InternetAddress(mailInfo.getToAddress());
            mailMessage.setRecipient(Message.RecipientType.TO, to);

            // 获取抄送者信息
            String[] ccs = mailInfo.getCcs();
            if (ccs != null ){
                // 为每个邮件接收者创建一个地址
                Address[] ccAdresses = new InternetAddress[ccs.length];
                for ( int i= 0 ; i<ccs.length; i++){
                    ccAdresses[i] = new InternetAddress(ccs[i]);
                }
                // 将抄送者信息设置到邮件信息中，注意类型为Message.RecipientType.CC
                mailMessage.setRecipients(Message.RecipientType.CC, ccAdresses);
            }

            mailMessage.setSubject(mailInfo.getSubject());
            mailMessage.setSentDate( new Date());
            // 设置邮件内容
            Multipart mainPart = new MimeMultipart();
            BodyPart html = new MimeBodyPart();
            html.setContent(mailInfo.getContent(), "text/html; charset=GBK" );
            mainPart.addBodyPart(html);
            mailMessage.setContent(mainPart);
            // 发送邮件
            Transport.send(mailMessage);
            return true ;
        } catch (MessagingException ex) {
            ex.printStackTrace();
        }
        return false ;
    }

    /**
     * 发送多接收者类型邮件的基本信息
     */
    public static class MultiMailSenderInfo extends MailSenderInfo{
        // 邮件的接收者，可以有多个
        private String[] receivers;
        // 邮件的抄送者，可以有多个
        private String[] ccs;

        public String[] getCcs() {
            return ccs;
        }
        public void setCcs(String[] ccs) {
            this .ccs = ccs;
        }
        public String[] getReceivers() {
            return receivers;
        }
        public void setReceivers(String[] receivers) {
            this .receivers = receivers;
        }
    }
}

第三个类：MyAuthenticator.java

package com.util.mail;

import javax.mail.*;

public class MyAuthenticator extends Authenticator{
    String userName= null ;
    String password= null ;

    public MyAuthenticator(){
    }
    public MyAuthenticator(String username, String password) {
        this .userName = username;
        this .password = password;
    }
    protected PasswordAuthentication getPasswordAuthentication(){
        return new PasswordAuthentication(userName, password);
    }
}

下面给出使用上面三个类的代码：

public static void main(String[] args){
         //这个类主要是设置邮件
      MultiMailSenderInfo mailInfo = new MultiMailSenderInfo();
      mailInfo.setMailServerHost( "smtp.163.com" );
      mailInfo.setMailServerPort( "25" );
      mailInfo.setValidate( true );
      mailInfo.setUserName( "[email protected]" );
      mailInfo.setPassword( "**********" ); //您的邮箱密码
      mailInfo.setFromAddress( "[email protected]" );
      mailInfo.setToAddress( "[email protected]" );
      mailInfo.setSubject( "设置邮箱标题" );
      mailInfo.setContent( "设置邮箱内容" );
      String[] receivers = new String[]{ "***@163.com" , "***@tom.com" };
      String[] ccs = receivers; mailInfo.setReceivers(receivers);
      mailInfo.setCcs(ccs);
      //这个类主要来发送邮件
      MultiMailsender sms = new MultiMailsender();
      sms.sendTextMail(mailInfo); //发送文体格式
      MultiMailsender.sendHtmlMail(mailInfo); //发送html格式
      MultiMailsender.sendMailtoMultiCC(mailInfo); //发送抄送

最后，给出朋友们几个注意的地方： 
1、使用此代码你可以完成你的javamail的邮件发送功能、发多个邮箱。三个类缺一不可。 
2、这三个类我打包是用的com.util.mail包，如果不喜欢，你可以自己改，但三个类文件必须在同一个包中 
3、不要使用你刚刚注册过的邮箱在程序中发邮件，如果你的163邮箱是刚注册不久，那你就不要使用“smtp.163.com”。因为你发不出去。刚注册的邮箱是不会给你这种权限的，也就是你不能通过验证。要使用你经常用的邮箱，而且时间比较长的。 
4、另一个问题就是mailInfo.setMailServerHost("smtp.163.com");与mailInfo.setFromAddress("[email protected]");这两句话。即如果你使用163smtp服务器，那么发送邮件地址就必须用163的邮箱，如果不的话，是不会发送成功的。 
5、关于javamail验证错误的问题，网上的解释有很多，但我看见的只有一个。就是我的第三个类。你只要复制全了代码，我想是不会有问题的。

6、 然后在Android项目中添加网络访问权限

<uses-permission android:name="android.permission.INTERNET"></uses-permission>